change system file

hc

2024-10-09 244b2c5ca8b14627e4a17755e5922221e121c771

 kernel/tools/testing/selftests/powerpc/alignment/Makefile
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..
@@ -1,3 +1,4 @@
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+# SPDX-License-Identifier: GPL-2.0-only
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 TEST_GEN_PROGS := copy_first_unaligned alignment_handler
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 top_srcdir = ../../../../..